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MIDI Implementation
❍
Key-based Instrument Controllers
Status
Data byte Status
F0H
7FH, 7FH, 0AH, 01H, 0nH, kkH, nnH, vvH
F7H
Byte Explanation
F0H Exclusive status
7FH ID number (universal realtime message)
7FH Device ID (Broadcast)
0AH Sub ID#1 (Key-Based Instrument Control)
01H Sub ID#2 (Controller)
0nH MIDI Channel (00 - 0FH)
kkH Key Number
nnH Control Number
vvH Value
nn=07H Level
vv = 00H - 7FH 0 - 200% (Relative)
nn=0AH Pan
vv = 00H - 7FH Left - Right (Absolute)
nn=5BH Reverb Send
vv = 00H - 7FH 0 - 127 (Absolute)
nn=5D Chorus Send
vv = 00H - 7FH 0 - 127 (Absolute)
::
F7 EOX (End Of Exclusive)
* This parameter affects drum instruments only.
❍
Data set 1 DT1 (12H)
Status
Data byte Status
F0H 41H, dev, 42H, 12H, aaH, bbH, F7H
ccH, ddH, ... eeH, sum
Byte Explanation
F0H Exclusive status
41H ID number (Roland)
dev Device ID (dev: 10H - 1FH, 7FH)
42H Model ID (GS)
12H Command ID (DT1)
aaH Address MSB: upper byte of the starting address of the
transmitted data
bbH Address: middle byte of the starting address of the
transmitted data
ccH Address LSB: lower byte of the starting address of the
transmitted data
ddH Data: the actual data to be transmitted. Multiple bytes
of data are transmitted starting from the address.
: :
eeH Data
sum Checksum
F7H EOX (End Of Exclusive)
* The amount of data that can be transmitted at one time depends on the type of data, and
data will be transmitted from the specified starting address and size.
* Data larger than 256 bytes will be divided into packets of 256 bytes or less, and each
packet will be sent at an interval of about 20 ms.
2. Data Transmission
■
Channel Voice Messages
●
Note off
Status 2nd byte 3rd byte
8nH kkH vvH
9nH kkH 00H
n = MIDI channel number: 0H - FH (ch.1 - 16)
kk = note number: 00H - 7FH (0 - 127)
vv = note off velocity: 00H - 7FH (0 - 127)
●
Note on
Status 2nd byte 3rd byte
9nH kkH vvH
n = MIDI channel number: 0H - FH (ch.1 - 16)
kk = note number: 00H - 7FH (0 - 127)
vv = note on velocity: 01H - 7FH (1 - 127)
●
Control Change
❍
Bank Select (Controller number 0, 32)
Status 2nd byte 3rd byte
BnH 00H mmH
BnH 20H llH
n = MIDI channel number: 0H - FH (ch.1 - 16)
mm, ll = Bank number: 00 00H - 7F 7FH (bank.1 - bank.16384)
* Not transmitted when Tx Program Change parameter (SYSTEM MIDI) is OFF.
❍
Modulation (Controller number 1)
Status 2nd byte 3rd byte
BnH 01H vvH
n = MIDI channel number: 0H - FH (ch.1 - 16)
vv = Modulation depth: 00H - 7FH (0 - 127)
* Not transmitted when Tx Modulation parameter (SYSTEM MIDI) is OFF.
❍
Portamento Time (Controller number 5)
Status
2nd byte 3rd byte
BnH 05H vvH
n = MIDI channel number: 0H - FH (ch.1 - 16)
vv = Portamento Time: 00H - 7FH (0 - 127)
❍
Data Entry (Controller number 6, 38)
Status
2nd byte 3rd byte
BnH 06H mmH
BnH 26H llH
n = MIDI channel number: 0H - FH (ch.1 - 16)
mm, ll = the value of the parameter specified by RPN/NRPN
mm = MSB, ll = LSB
❍
Volume (Controller number 7)
Status
2nd byte 3rd byte
BnH 07H vvH
n = MIDI channel number: 0H - FH (ch.1 - 16)
vv = Volume: 00H - 7FH (0 - 127)
❍
Panpot (Controller number 10)
Status
2nd byte 3rd byte
BnH 0AH vvH
n = MIDI channel number: 0H - FH (ch.1 - 16)
vv = Panpot: 00H - 40H - 7FH (Left - Center - Right),
❍
Expression (Controller number 11)
Status
2nd byte 3rd byte
BnH 0BH vvH
n = MIDI channel number: 0H - FH (ch.1 - 16)
vv = Expression: 00H - 7FH (0 - 127)
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